US Patent 12111977 Device and method for inputting characters

A method includes displaying a first screen of a keyboard area having an upper pseudo-image part, a lower pseudo-image part, and multiple image-pixel keys, changing a Unicode character in one of the upper pseudo-image part and the lower pseudo-image part into a first non-blank Unicode character in the first screen in response to a first image-pixel key input, displaying a second screen of the keyboard area different from the first screen, providing the upper pseudo-image part in a text input area in response to a first image-part key input, providing a word in the text input area in response to at least one letter key input, and providing the lower pseudo-image part in the text input area in response to a second image-part key input.